71939975 has 12 divisors (see below), whose sum is σ = 93084816. Its totient is φ = 55049280.

The previous prime is 71939963. The next prime is 71939983. The reversal of 71939975 is 57993917.

It is a happy number.

It is not a de Polignac number, because 71939975 - 2²⁴ = 55162759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61982 + ... + 63131.

It is an arithmetic number, because the mean of its divisors is an integer number (7757068).

Almost surely, 2^71939975 is an apocalyptic number.

71939975 is a deficient number, since it is larger than the sum of its proper divisors (21144841).

71939975 is a wasteful number, since it uses less digits than its factorization.

71939975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125146 (or 125141 counting only the distinct ones).

The product of its digits is 535815, while the sum is 50.

The square root of 71939975 is about 8481.7436297026. The cubic root of 71939975 is about 415.9011241062.

The spelling of 71939975 in words is "seventy-one million, nine hundred thirty-nine thousand, nine hundred seventy-five".